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Dyfyniad Arddull ChicagoPorter, Neil A. Physicists in Conflict. London: Institute of Physics, 1998.
Dyfyniad MLAPorter, Neil A. Physicists in Conflict. Institute of Physics, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.